1/*
2 * Copyright (c) 2014 Advanced Micro Devices, Inc.
3 * Copyright (c) 2012 ARM Limited
4 * All rights reserved
5 *
6 * The license below extends only to copyright in the software and shall
7 * not be construed as granting a license to any other intellectual
8 * property including but not limited to intellectual property relating

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110 next_thread_stack_base(0),
111 M5_pid(system->allocatePID()),
112 useArchPT(params->useArchPT),
113 kvmInSE(params->kvmInSE),
114 pTable(useArchPT ?
115 static_cast<PageTableBase *>(new ArchPageTable(name(), M5_pid, system)) :
116 static_cast<PageTableBase *>(new FuncPageTable(name(), M5_pid)) ),
117 initVirtMem(system->getSystemPort(), this,
118 SETranslatingPortProxy::Always),
119 fd_map(new FdMap[NUM_FDS])
120{
121 string in = params->input;
122 string out = params->output;
123 string err = params->errout;
124
125 // initialize file descriptors to default: same as simulator
126 int stdin_fd, stdout_fd, stderr_fd;
127

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171 fdo->fd = stderr_fd;
172 fdo->filename = err;
173 fdo->flags = O_WRONLY;
174 fdo->mode = -1;
175 fdo->fileOffset = 0;
176
177
178 // mark remaining fds as free
179 for (int i = 3; i < NUM_FDS; ++i) {
180 fdo = &fd_map[i];
181 fdo->fd = -1;
182 }
183
184 mmap_start = mmap_end = 0;
185 nxm_start = nxm_end = 0;
186 // other parameters will be initialized when the program is loaded
187}

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196 .name(name() + ".num_syscalls")
197 .desc("Number of system calls")
198 ;
199}
200
201//
202// static helper functions
203//
204
205int
206Process::openInputFile(const string &filename)
207{
208 int fd = open(filename.c_str(), O_RDONLY);
209
210 if (fd == -1) {
211 perror(NULL);
212 cerr << "unable to open \"" << filename << "\" for reading\n";

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229 }
230
231 return fd;
232}
233
234ThreadContext *
235Process::findFreeContext()
236{
237 for (int id : contextIds) {
238 ThreadContext *tc = system->getThreadContext(id);
239 if (tc->status() == ThreadContext::Halted)
240 return tc;
241 }
242 return NULL;
243}
244
245void
246Process::initState()
247{
248 if (contextIds.empty())

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259
260DrainState
261Process::drain()
262{
263 find_file_offsets();
264 return DrainState::Drained;
265}
266
267int
268Process::alloc_fd(int sim_fd, const string& filename, int flags, int mode,
269 bool pipe)
270{
271 // in case open() returns an error, don't allocate a new fd
272 if (sim_fd == -1)
273 return -1;
274
275 // find first free target fd
276 for (int free_fd = 0; free_fd < NUM_FDS; ++free_fd) {
277 Process::FdMap *fdo = &fd_map[free_fd];
278 if (fdo->fd == -1 && fdo->driver == NULL) {
279 fdo->fd = sim_fd;
280 fdo->filename = filename;
281 fdo->mode = mode;
282 fdo->fileOffset = 0;
283 fdo->flags = flags;
284 fdo->isPipe = pipe;
285 fdo->readPipeSource = 0;
286 return free_fd;
287 }
288 }
289
290 panic("Process::alloc_fd: out of file descriptors!");
291}
292
293void
294Process::free_fdmap_entry(int tgt_fd)
295{
296 Process::FdMap *fdo = &fd_map[tgt_fd];
297 assert(fd_map[tgt_fd].fd > -1);
298
299 fdo->fd = -1;
300 fdo->filename = "NULL";
301 fdo->mode = 0;
302 fdo->fileOffset = 0;
303 fdo->flags = 0;
304 fdo->isPipe = false;
305 fdo->readPipeSource = 0;
306 fdo->driver = NULL;
307}
308
309int
310Process::sim_fd(int tgt_fd)
311{
312 FdMap *obj = sim_fd_obj(tgt_fd);
313 return obj ? obj->fd : -1;
314}
315
316Process::FdMap *
317Process::sim_fd_obj(int tgt_fd)
318{
319 if (tgt_fd < 0 || tgt_fd >= NUM_FDS)
320 return NULL;
321 return &fd_map[tgt_fd];
322}
323
324int
325Process::tgt_fd(int sim_fd)
326{
327 for (int index = 0; index < NUM_FDS; ++index)
328 if (fd_map[index].fd == sim_fd)
329 return index;
330 return -1;
331}
332
333void
334Process::allocateMem(Addr vaddr, int64_t size, bool clobber)
335{
336 int npages = divCeil(size, (int64_t)PageBytes);
337 Addr paddr = system->allocPhysPages(npages);
338 pTable->map(vaddr, paddr, size, clobber ? PageTableBase::Clobber : 0);
339}
340

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414 panic("Unable to seek to correct location in file: %s", err);
415 }
416
417 fdo_stdin->fd = stdin_fd;
418 fdo_stdout->fd = stdout_fd;
419 fdo_stderr->fd = stderr_fd;
420
421
422 for (int free_fd = 3; free_fd < NUM_FDS; ++free_fd) {
423 Process::FdMap *fdo = &fd_map[free_fd];
424 if (fdo->fd != -1) {
425 if (fdo->isPipe){
426 if (fdo->filename == "PIPE-WRITE")
427 continue;
428 else {
429 assert (fdo->filename == "PIPE-READ");
430 //create a new pipe

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457 }
458 }
459 }
460}
461
462void
463Process::find_file_offsets()
464{
465 for (int free_fd = 0; free_fd < NUM_FDS; ++free_fd) {
466 Process::FdMap *fdo = &fd_map[free_fd];
467 if (fdo->fd != -1) {
468 fdo->fileOffset = lseek(fdo->fd, 0, SEEK_CUR);
469 } else {
470 fdo->filename = "NULL";
471 fdo->fileOffset = 0;
472 }
473 }

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510 SERIALIZE_SCALAR(stack_size);
511 SERIALIZE_SCALAR(stack_min);
512 SERIALIZE_SCALAR(next_thread_stack_base);
513 SERIALIZE_SCALAR(mmap_start);
514 SERIALIZE_SCALAR(mmap_end);
515 SERIALIZE_SCALAR(nxm_start);
516 SERIALIZE_SCALAR(nxm_end);
517 pTable->serialize(cp);
518 for (int x = 0; x < NUM_FDS; x++) {
519 fd_map[x].serializeSection(cp, csprintf("FdMap%d", x));
520 }
521 SERIALIZE_SCALAR(M5_pid);
522
523}
524
525void
526Process::unserialize(CheckpointIn &cp)
527{
528 UNSERIALIZE_SCALAR(brk_point);
529 UNSERIALIZE_SCALAR(stack_base);
530 UNSERIALIZE_SCALAR(stack_size);
531 UNSERIALIZE_SCALAR(stack_min);
532 UNSERIALIZE_SCALAR(next_thread_stack_base);
533 UNSERIALIZE_SCALAR(mmap_start);
534 UNSERIALIZE_SCALAR(mmap_end);
535 UNSERIALIZE_SCALAR(nxm_start);
536 UNSERIALIZE_SCALAR(nxm_end);
537 pTable->unserialize(cp);
538 for (int x = 0; x < NUM_FDS; x++) {
539 fd_map[x].unserializeSection(cp, csprintf("FdMap%d", x));
540 }
541 fix_file_offsets();
542 UNSERIALIZE_OPT_SCALAR(M5_pid);
543 // The above returns a bool so that you could do something if you don't
544 // find the param in the checkpoint if you wanted to, like set a default
545 // but in this case we'll just stick with the instantianted value if not
546 // found.
547}
548
549
550bool
551Process::map(Addr vaddr, Addr paddr, int size, bool cacheable)
552{
553 pTable->map(vaddr, paddr, size,
554 cacheable ? 0 : PageTableBase::Uncacheable);

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